2004/03/31 by Andrea Morello, O. N. Bakharev, Oleg N. Bakharev +5 · 1 citation
Chemistry · Materials Science · Physics and Astronomy · #Advanced NMR Techniques and Applications #Lanthanide and Transition Metal Complexes #Magnetism in coordination complexes #cond-mat.mes-hall #cond-mat.mtrl-sci
paper · pdf · doi:10.1103/physrevlett.93.197202
published as Phys. Rev. Lett. 93, 197202 (2004) · RevTex, 4 pages, 3 eps figures. Final version appeared in PRL
openalex publication_date 2004/11/04 · arxiv created 2004/11/16 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We show that the nuclear spin dynamics in the single-molecule magnet Mn12-ac below 1 K is governed by quantum tunneling fluctuations of the cluster spins, combined with intercluster nuclear spin diffusion. We also obtain the first experimental proof that-surprisingly-even deep in the quantum regime the nuclear spins remain in good thermal contact with the lattice phonons. We propose a simple model for how T-independent tunneling fluctuations can relax the nuclear polarization to the lattice that may serve as a framework for more sophisticated theories.